AMD Radeon RX 480 in CrossFire

AMD made a short Ashes of Singularity demonstration of Radeon RX 480 running in CF during Computex Polaris announcement. Such configuration was compared to NVIDIA’s GeForce GTX 1080, and according to AMD, RX 480 CF offers better framerate while being utilized at 151% 183% (single-GPU scaling, via).

Robert Hallock (Head of Global Technical Marketing at AMD) shared more details about this demonstration. The first thing we learn are the exact benchmarks results performed by AMD:

GPU

FPS

Single Batch GPU Utilization

Med Batch GPU Utilization

Heavy Batch GPU Utilization

2x Radeon RX 480

62.5 fps

51.0%

71.9 %

92.3%

1x GTX 1080

58.7 fps

98.7%

97.9%

98.7%

But more importantly Robert Hallock explained the ‘controversy’ over different image quality using competing hardware:

At present the GTX 1080 is incorrectly executing the terrain shaders responsible for populating the environment with the appropriate amount of snow. The GTX 1080 is doing less work to render AOTS than it otherwise would if the shader were being run properly.

It was also explained that each run of AOTS benchmark is randomized and it’s impossible to capture the same footage in each run. Furthermore we are told that prior to the announcement, this test was performed 10 times, and even at higher resolution (1440p), but the results were almost the same.

AMD Radeon RX 480 in Doom 1080p/1440p VSR

Clubic took some footage of Radeon RX 480 being demoed with Doom shortly after the live stream ended. While the native resolution of this monitor is 1080p, it was also confirmed by Robert that this demo is using VSR @ 1440p.